Heat reflecting device



Feb. 5, 1935.

s. A. HoRsTMANN HEAT REFLECTING DEVICE Original Filed Nov. 27, 1931Patented Feb. 5, 1935 UNITED STATES PATENT OFFICE Application November27, 1931, Serial No. 577,685. Renewed November 26, 1934. In GreatBritain December 10, 1930 2 Claims.

This invention relates to a new form of heating apparatus whereby heatfrom a heating element or elements is distributed by rotating oroscillating reflectors, the motion being imparted to the said reflectorsby convection currents of air from the source of heat or b'y any knownmechanical means.

The object of this method of distribution is to sweep any predeterminedplane (e. g. a horizontal plane like a floor) or planes with acontinuously moving beam or beams of heat, which may be wholly reflectedor indirect beams, or preferably a combination of indirect and directbeams.

One way of carrying this invention into effect is to mount threeleaf-shaped reflectors angularly equidistant apart on a centre plate andspaced so that the beam of one reector can be projected between theother two; between these reflectors or leaves and above the reflectingbeam three smaller leaves or vanes are mounted and so shaped that theyact as impellers to rotate the whole around a centre or bearing mountedin the centre plate. A suitable heating element is mounted more or lesscentral in relation to the reflectors and in a suitable plane inrelation to them. A large proportion of the heat of the element isreflected by the reflecting leaves, but convection currents of air areset up to a certain extent which have the effect of rotating the device30 around a suitable support for the centre or bearing.

For a clearer understanding of this invention reference may be made tothe accompanying drawing in which various embodiments are illustrated byway of example only, and wherein like letters indicate correspondingparts in the several views. In said drawing:-

Figure 1 is a side elevation of one form of this invention;

Figures 2 and 3 are elevations showing two alternative methods ofsupporting the bearing of rotor; and

Figure 4 is a diagram of a totally enclosed form hereinafter described.

Referring to Figure l, a, a, a are the reflecting varies, b, b, b areimpeller varies, and c is a suitable centre plate to which all vanes arefixed. A base g is provided with an insulator h which carries anelectrical heating element e shown dot- 50 ted. Above the element may bemounted a defiector plate f. A cranked vertical support d has a hollowcentre to receive a needle point 7' which is fixed in a suitable needleholder bolted to the centre of plate c. The aforesaid vertical supportis rigidly attached to the base g in any suitable manner. The knob iforms the apex to which three bent rods are attached which are fixed tothe base g and form a protecting cage, the knob i forming a convenientmeans of handling the stove.

Figures 2 and 3 show modifications of the apparatus with varies removedfor clearness. In Figure 2 a central vertical support rod passes throughthe heating element. With this construction the element impartsconsiderable heat to this vertical rod and in order to preventdestructive heating effects being conducted to the bearing the rod isbent into coils such as x, at. 'Ihe coils are preferably of helicalformation which do not touch where they cross one another.

With this arrangement the vertical support rod d is convenientlyattached to the insulator h and may also pass through the top of base gthus forming a convenient means of attaching these two parts. Furthermodifications shown in Figure 2 are the additions of the bridge piece kand the carrying ring Z. The needle bearing is here enlarged to form atapered shoulder, and the bridge piece lc is pierced with a hole ofsmaller size than the taper on shoulder but a loose t on the spindle, sothat when the device is working no friction results except on thebearing proper. However, when it is desired, the whole apparatus can becarried by the ring l because the weight of the base and heating elementis taken by the taper shoulder of the spindle jamming in the hole of thebridge piece lc.

The bridge piece k is advantageously made quickly detachable from thecentre plate c so that the bearing or needle point can be quicklyremoved when worn or damaged. Figure 3 shows another form of heatinsulator for the bearing 1'; in this case the spindle d is shorter andthreaded at the top end to receive a nut. A ring m of preferably flatsection steel is joined by an insulator o to which it may be rivetted.In the centre of this insulator o is mounted a needle bearingcorresponding to that in Figure 2. The ring m is conveniently attachedto the spindle g by a nut of any form which may also serve to secure thedeflector plate f. With the construction shown in Figures 2 and 3 theprotecting cage and knob z' may be eliminated.

The reflectors a may be so arranged that they completely orsubstantially surround the heating element or elements. In this casethey could be so shaped in helical or other formation that the inside ofone would reflect to the outside of another and from thence to the areato be heated. For example in Figure 4 a series of reflectors p of thelouvre form (two only of which are shown) surround the heater e. Theheat rays strike the inner surfaces 1' and are reflected to the adja-`cent outer surfaces s and thence to the surrounding area to be heated.The reflectors p may be solid or hollow. In this case the reflectors mayform their own impellers for rotation.

In the accompanying drawing an electrical element has been shown but anyother form of heat such as gas, oil or the like may be used.

The bearing on which the Varies rotate may be of any known form. In theforms illustrated a hollowed centre has been provided on the ver'- ticalsupport and a needle mounted in a holder which carries the vanes. Thehollowed centre may be lled with thick oil forr lubrication.

It should be clearly understood that I do` not restrict myself to theconstruction described and illustrated and that many variations fallwithin the scope of the invention as deined by the appended claims.

1-. Ina heating apparatusithe combination of a heating element,rotatable impeller and separate heat reflecting members associated inangular relation with said heating element whereby convection currentsof air from said heating element impinge against said impeller therebycausing same to rotate and in turn rotate said heat reflecting members.

2. A heating apparatus comprising a heating element, a support extendingabove said heating element and directly exposed to the heat thereof, abearing carried by said support, heat reecting members rotatably mountedon said bearing and disposed to reflect heat laterally from said heatingelement, and means separate from said members connected therewith anddisposed to be rotated by convection currents emanating from the heatingelement thereby to impart rotation to the reecting members, said supporthaving a ring-like formation to impede the conduction of heat throughthe support to the bear- 20 ing.

' SIDNEY ADOLPH HORSTMANN.

